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Full text of "The Cambridge Natural History"

379

the Camnroori river, wliere it Is extremely rare. The nostril*
(blow-hoi^', "Tt-i prolonged iao a snout-like process, a, i\s;fc which is
of ii^?;1^'!} in connexion vath the assert, lor?, -'^it Li Z1 tfnennpterG,
the blcv, -L !e is puffed oat during spouting, "VV-L*: is lef-cporary
in the Rorqyuil appears to be permanent In the fiotafo'ft. More
remarkable ,'!;, y-rhaps, is the assertion that it  is a vegetable-
feeding 'Diii'^hlji. This is not a mere assertion except that It
may not ap* ,.; universally ; for in the stom^,r;h of a specimen
nothing Vwf vegt- table debris was found. But in the stomachs of
other "W>r\!',?s 'e.g. Hthacfiianecfas) vegetable matter lias also been
found, which x&b,y perhaps have been taken in accidentally with
the food.
&7/V10  er^.^g near  Sotalia,          Dr.  Blanford  has  transferred
to it (niii:,r the one Bame of JSteiw perniger) the two species,
Sotnlia ;f'*-1'' " :e and Sntalia lentiginosa. l is, however, to be
dist*.ng\J '!:*.-; from So folia by the following characters:  Teeth.
large unii :v!.v,, t \vtsiity to twenty-seven on each          of each, jaw,
with furrowed surfaces to crowns. Vertebrae C *7, I) 12 or 13,
1L 15, Ca 30 to 32. Pterygoids in contact. There are but two
species apparently (not counting Dr. Blanforcfs).
Tursiops is not a very easily definable genus. These
are its chief features :-  Teeth large, twenty -two to twenty-
six in number in each half of each jaw. Vertebral formula
G *7, I> 12 or 13, L 16 or 17, Ca 2*7. Pterygoida in contact.
Beak distinct. Some five species are allowed ; but it seems
to be difficult to differentiate the others from Turmops tnrsio*
This, the best-known form* is quite or nearly world-wide in
range, and occurs, though not abundantly, on our own coasts.
Mr. True has observed that the eyelids of this Whale^ which
is largely hunted on the American coast,, are as mobile as
those of a terrestrial mammal. The name * tursio ** is derived
from Pliny. ]Beion would also derive from this word the
French vernacular *e marsouin/* The latter term is sometimes
regarded as a corruption of ** Meerschwein/* but it would aeem
to be more probably derivable from, ** marinum suem,/* from the
Latin direct. T* tursio has the back black to lead - colour ;
the under parts white. In the reputed species, 5T.
from the Red Sea, the back is a dark sea-green* T. tw*io
a length of 12 feet, but is more usually smaller,
The   genus    Twmo   must   be   carefully   distinguished   from